Global Patent Index - EP 2652622 B1

EP 2652622 B1 20201118 - PARTIAL RECALL OF DEDUPLICATED FILES

Title (en)

PARTIAL RECALL OF DEDUPLICATED FILES

Title (de)

TEILWEISER RÜCKRUF VON DEDUPLIZIERTEN DATEIEN

Title (fr)

RAPPEL PARTIEL DE FICHIERS DÉDUPLIQUÉS

Publication

EP 2652622 B1 20201118 (EN)

Application

EP 11847971 A 20111216

Priority

  • US 97084810 A 20101216
  • US 2011065658 W 20111216

Abstract (en)

[origin: US2012158675A1] The subject disclosure is directed towards changing a file from a fully deduplicated state to a partially deduplicated state in which some of the file data is deduplicated in a chunk store, and some is recalled into the file, that is, in the file's storage volume. A partial recall mechanism such as in a file system filter tracks (e.g., via a bitmap in a file reparse point) whether file data is maintained in the chunk store or has been recalled to the file. Data is recalled from the chunk store as needed, and committed (e.g., flushed) to the file. Also described is efficiently returning the file to a fully deduplicated state by using the tracking information to determine which parts of the file are already deduplicated into the chunk store so as to avoid their further deduplication processing.

IPC 8 full level

G06F 12/00 (2006.01); G06F 11/14 (2006.01); G06F 16/174 (2019.01)

CPC (source: EP US)

G06F 16/1748 (2019.01 - EP US)

Citation (examination)

  • ANONYMOUS: "Stable storage - Wikipedia", 6 September 2010 (2010-09-06), XP055530116, Retrieved from the Internet <URL:https://en.wikipedia.org/w/index.php?title=Stable_storage&oldid=383332676> [retrieved on 20181204]
  • ANONYMOUS: "EMC Celerra Network Server v 5.6.49.3 (Padding zeros for partial block write)", 7 May 2010 (2010-05-07), pages 1,255, XP055622275, Retrieved from the Internet <URL:https://www.dell.com > vjauj58549 > celerra > 5.6.49.3_300-004-151_a21.pdf> [retrieved on 20190913]

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

US 2012158675 A1 20120621; US 8645335 B2 20140204; CN 102591944 A 20120718; CN 102591944 B 20141029; EP 2652622 A2 20131023; EP 2652622 A4 20140813; EP 2652622 B1 20201118; HK 1173521 A1 20130516; WO 2012083263 A2 20120621; WO 2012083263 A3 20121108

DOCDB simple family (application)

US 97084810 A 20101216; CN 201110444139 A 20111215; EP 11847971 A 20111216; HK 13100336 A 20130109; US 2011065658 W 20111216